some people doubt whether ten years' teaching in poor mountainous areas is worth a free education in teachers' colleges.

some people doubt whether ten years' teaching in poor mountainous areas is worth a free education in teachers' colleges.
some people doubt whether ten years' teaching in poor mountainous areas is worth a free education in teachers' colleges.

some people doubt whether ten years' teaching in poor mountainous areas is worth a free education in teachers' colleges.
有些人怀疑,在穷山沟里教十年的书,去换取师范学院的免费教育是否值得?